Primerless pipeline coating tape

Abstract

A article for wrapping objects comprising a plurality of layers, including a first layer of a wrap material, an intermediate layer of an adhesive material and an inner layer of a solids material, said article providing resistance to cathodic disbondment from said object at least equal to an adhesive bearing wrap applied with a solvent based primer.

We claim: 
     
       1. An article for wrapping objects, said article comprising a plurality of layers, including: a first layer of a wrap material;   an intermediate layer of a flexible, adhesive material; and   an inner layer of a flexible solids material, said solids material being comprised of: (a) from 10 to 55 weight percent thermoplastic elastomer;   (b) from 27 to 75 weight percent resin material;   (c) from 0 to 25 weight percent polyolefin; and   (d) from 0 to 3 weight percent anti-oxidant,     where said thermoplastic elastomer is selected from the group consisting of SIS or SEBS tri-block copolymers, SEP or SEB di-block copolymers and styrene-butadiene branched block copolymers, where S is a polymeric styrene block, B is a polymeric butadiene block, I is a polymeric isoprene block, EP is a polymeric ethylene/propylene block and EB is a polymeric ethylene-butylene block; n>1;   where said resin material is selected from the group consisting of white mineral oil, phenolic resin and a phenolic-modified terpene resin;   where said polyolefin is selected from the group consisting of naphthenic oil and naphthenic oil modified with a filler; wherein said article provides resistance to cathodic disbondment from said object at least equal to an adhesive bearing wrap applied with a solvent based primer.     
     
     
       2. An article in accordance with claim 1, wherein said wrap material is a rubber material. 
     
     
       3. An article in accordance with claim 1, wherein said adhesive material is a hot melt adhesive. 
     
     
       4. An article for wrapping objects, said article comprising a plurality of layers, including: a first layer of a wrap material;   an intermediate layer of a flexible, adhesive material; and   an inner layer of a flexible solids material, said solids material being comprised of: (a) from 10 to 55 weight percent thermoplastic elastomer of block copolymers;   (b) from 27 to 75 weight percent resin material where said resin material is selected from the group consisting of white mineral oil, phenolic resin and phenolic-modified terpene resin;   (c) from 0 to 25 weight percent polyolefin where said polyolefin is selected to lower the viscosity of said solids material of said solids material; and   (d) from 0 to 3 weight percent anti-oxidant, wherein said article provides resistance to cathodic disbondment from said object at least equal to an adhesive bearing wrap applied with a solvent based primer.     
     
     
       5. An article in accordance with claim 4, wherein said antioxidant is selected from the group consisting of 2,2'-Methylene-bis (4-methyl-6-tertiary-butyl phenol) and a 50--50 mixture of mono and dinonylphenyl phosphite. 
     
     
       6. An article in accordance with claim 4, wherein said polyolefin improves the tackification of said solids material.